Not too keen on mustard or chocolate, and I don't particularly like the marbles.
I love pure while, a really good black, corn-flower blue, a really fantastic green, those velvety blue/purple ones with black heads and anything striking with butterful markings.
I also love a really bright red and blue mix. Oz is a rusty red with green and blue iridesence. He's not that stunning, but obviously I love him.